Selphie's Limit Break is Slots. The type of magic you use depends on luck. If you do not like the spell, then press "Do over" to try again.

Zell's Limit breaks are gained by reading the Combat King magazines. These are their locations:

Combat King 001: First floor of D District Prison
Combat King 002: Defeat Fujin and Rajin
Combat King 003: Girl who has a crush on Zell in Balamb hotel
Combat King 004: Second visit to Esthar, from Esthar soldier Combat King
Combat King 005: Lunatic Pandora as Squall
Note: All of the Combat Kings can be bought at the Esthar book shop with Tonberry's Familiar ability.

Rinoa's Limit Breaks are gained by setting the type of trick you want Angelo to learn, then walking around with Rinoa in your party. New tricks can be learned by reading certain magazines. These magazines are: